Middlings mill



Feb 26 1924., 1,434,715

G. M. KEMP MIDDLINGS MILL- Filed May 9. 1923 2 Sheets-Sheet X INVENTOR G M. Kemp,

ATTORNEYS Feb. 26 192 3 11,484,735

' G. M. KEMP MIDDLINGS MILL Filed May 9. 1925 2 Sheets-Sheet 2 i pl WITNESSES INVENTOR MlQamp,

W BY I v 26 I v iwomv avs Patented Feb. 26, I924.

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MIDDLINGS I MILL.

Application filed May a, 1923. Serial No. 637,736.

To all whom it may concern:

Be it known that I, GEORGE MILLIARD Timur, a citizen of the United States, and a resident of Nilliamsport, in the county of Washington and State of Maryland, have invented certain new and useful Improvements in Middlings Mills, of lowing is a specification.

' 'My invention relates to improvements in middlings mills, and has for its object to extract from the middlingsall of the available flour contained therein.

' A further object' is' to provide a middlings mill which is of highly simplified construction, capable of a high output and comparatively cheap to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this application, and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a perspective of the improved middlings mill,

Fig. 2 is a longitudinal sectional view through the same,

Fig. 3 is a vertical transverse sectional view through the mill, and

Fig. 4 is a detail sectional view through one of the stators or annuli embodied inthe invention.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of the invention, the numeral 5 generally designates a cylindrical casing consisting of upper and lower semi-cylindrical sections 6 and 7 respectively. Fig. 3 illustrates that the abutting edges of the sections 6 and 7 are formed with laterally projecting flanges 9 through which fastening devices 10 are extended.

With reference to Fig. 2, it will be observed that a plurality of annuli or stators 12 are arranged in spaced relation within the casing and are partially received in annular groves 13 whereby the same are held against movement longitudinally of the casing. Also, the stators or annuli 12 are held against rotation by means of set screws 14 threaded through the casing and adjustable upon the exterior of the same.

The middlings are introduced into the casing by way of a hopper 16 and the middlings encounter a plurality of spiral rotors which the fol- I 18 whichserve to feed the middlingsv against the annuli 12.

,As the several rotors 18 turn, the middlings are advanced into engagement with the stators l2 and subjected to the action of a plurality of radial corrugations or ribs 20 on the stators.

It will be seen that the movement of the middlings outwardly toward the wall or periphery of the casing upon encountering the stators 12, is prevented and consequently, the middlings move inwardly between the ribs 20 and pass through the centrally arranged opening in each stator.

In other words, as the members 18 revolve, 7 they press the middlings into engagement with the radially corrugated stators 12 and the middlings then move inwardly in the radial grooves or corrugations 20 and pass through the centrally arranged openings 12 7 into the next compartment.

This operation is repeated as the middlings pass through each compartment formed by the stators and when the last compartment is finally reached, the grinding operation is completed and all of the flour contained in the middlings is separated so that the sifting operation may be profitably performed.

In the practice of my invention, it has been found that by increasing the number of stators and rotors, the grinding operation may be more thoroughly performed. However, this is necessary only under certain conditions.

The products of the grinding operation may be discharged through an outlet opening 30 and into a receiver 32. Of course the material in the receiver 32 may be removed by way of an outlet opening 33 or by any other means.

The several rotors 18 are mounted upon the longitudinally extending shaft 35 and the shaft is provided at one end with a threaded stem 36 upon which a hand wheel 38 is mounted, and it will be seen that by rotating the hand wheel 38 against an abutment 40, the shaft, and consequently the rotors, will be moved longitudinally. This forms a means whereby the contact between the rotors and the stators may be varied as the occasion requires.

Main bearings 46 are located at opposite ends of the casing and rotatably support the shaft 35. A wheel 50 is mounted upon the 315? shaft 35 and has connection with a belt 52, by means of which the mill may be operated.

Attention is directed to the fact that at one end of each rotor 18 at the outer edge of the same may be provided a laterally projecting flange 53, by means of which the blade is reinforced to withstand the strain incident to Igrinding.

aving thus described the invention, what.

is claimed is 1. A middlings mill comprising a cylindrical casing having its inner side formed with continuous grooves, a plurality of annular detachable spaced stators having their peripheral portions received in said grooves whereby the passage of material between the stators and the casing is prevented, a plurality of rotors arranged within the casing between the stators and having their ends engaged with the stators, said stators being provided with radial depressions and with centrally arranged openings of a substantial size communicating with the radial depressions, whereby the middlings may move inwardly and through the openings, and means supporting the rotors.

2. A middlings mill comprising a cylindrical casing having its inner side formed with continuous grooves, a plurality of annular detachable spaced stators having their peripheral portions received in said grooves whereby the passage of material between the stators and the casing is prevented, a plurality of rotors arranged within the casing between the stators and having their ends engaged with the stators, said stators being provided with radial depressions and with centrally arranged openings of a substantial size communicating with the radial depressions, whereby the Vmiddlings may move inwardly and through the openings, and means supporting the rotors, the outer edges of said rotors being provided with latorally projecting flanges adjacent the stators.

' GEORGE MILLIARD KEMP. 

